prove (1/sini2Θ) - (cos2/sin2Θ) = tanΘ
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By using Double Angle Formulas
1-Cos 2tita =2 Sin ^2 tita
Sin 2tita=2Sin tita Cos tita
LHS=2 Sin ^2 tita/2Sin tita Cos tita
LHS=Tan tita
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